[1] Univ Porto, Fac Med, MEDCIDS Dept Community Med Informat & Hlth Decis S, Porto, Portugal
[2] Univ Porto, Fac Med, CINTESIS RISE Hlth Res Network, MEDCIDS, Porto, Portugal
[3] Hosp Gen Univ Gregorio Maranon, Allergy Serv, Madrid, Spain
[4] Gregorio Maranon Hlth Res Inst, Madrid, Spain
[5] Natl Hosp Org, Sagamihara Natl Hosp, Clin Res Ctr Allergy & Rheumatol, Sagamihara, Kanagawa, Japan
[6] Univ Hosp Geneva, Dept Pediat Gynecol & Obstet, Pediat Allergy Unit, Geneva, Switzerland